Maybe, maybe not. Some people abandon books, some people who are regular producers clear them and put them at the bottom of the pile, perhaps for years (though they will get round to them sometime), and some people just simply take two or three years to produce a book.
Once, we put names and contact details on the public InProg list, but for privacy and spam-prevention reasons, we've taken them off. However, the Posting Team have access to the master list of cleared files, and will send a message on your behalf to the person who originally cleared the book, asking if the project is still active, or if the producer wants help.
So if you really want to check this situation out, e-mail one of the Posting Team.